C Data Types

In c we declare a variable with a data type to store the type of data.
Here are some data types

Integer Types - int, short, long, unsigned int, unsigned short, unsigned long
Floating-Point Types - float, double, long double
Character Type - char

Integer Types

A varable which is declared by a integer data type then the value only holds integer values.
There are different types of integer to allocate fixed memory to the variable base on the size it provides to hold a value.

Type

Size (bytes)

Range

int

-2,147,483,648 to 2,147,483,647

short

-32,768 to 32,767

long

4 or 8 (platform-dependent)

-2,147,483,648 to 2,147,483,647 (32-bit) or -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807 (64-bit)

unsigned int

0 to 4,294,967,295

unsigned short

0 to 65,535

unsigned long

4 or 8 (platform-dependent)

0 to 4,294,967,295 (32-bit) or 0 to 18,446,744,073,709,551,615 (64-bit)

Example

#include <stdio.h>

int main() {
    int integerVar = 42;
    short shortVar = 32767; 
    long longVar = 1234567890;
    unsigned int unsignedIntVar = 100; 
    unsigned short unsignedShortVar = 65535; 
    unsigned long unsignedLongVar = 4294967295; 

    printf("Integer: %d\n", integerVar);
    printf("Short: %d\n", shortVar);
    printf("Long: %ld\n", longVar);
    printf("Unsigned Integer: %u\n", unsignedIntVar);
    printf("Unsigned Short: %u\n", unsignedShortVar);
    printf("Unsigned Long: %u\n", unsignedLongVar);

    return 0;
}

Floating-point Types

A varable which is declared by a Float data type then the value only holds decimal values.
There are different types of float to allocate fixed memory to the variable base on the size it provides to hold a number of decimal values.

Type

Size (bytes)

Precision

Range

float

6 decimal places

±1.17549e-38 to ±3.40282e+38

double

15 decimal places

±2.22507e-308 to ±1.79769e+308

long double

Platform-dependent

Extended precision

Platform-dependent

Example

#include <stdio.h>

int main() {
    float price = 29.99;
    double pi = 3.141592653589793;
    long double largeNumber = 12345678901234567890.123456789;
    
    printf("Price: $%.2f\n", price);
    printf("Value of Pi: %.10f\n", pi);
    printf("Large Number: %.15Lf\n", largeNumber);

    return 0;
}

Character Type

char is the only Character type in c.
It has always a size of 1 byte.
Has a Range of -128 to 127 (signed) or 0 to 255 (unsigned)

Example

#include <stdio.h>

int main() {
    char charVar = 'A';
    
    printf("Character: %c\n", charVar);

    return 0;
}

Quick Recap - Topics Covered

Introduction and history of C

Data Types in C

Integer Data Types

Float Data Types

Character Data Types

Practice With Examples in Compilers

The Concepts and codes you leart practice in Compilers till you are confident of doing on your own. A Various methods of examples, concepts, codes availble in our websites. Don't know where to start Down some code examples are given for this page topic use the code and compiler.

C Data Types

Integer Types

Example

Floating-point Types

Example

Character Type

Example

Quick Recap - Topics Covered

Practice With Examples in Compilers

Example JS

Quiz